iOS: Reeder, our favorite RSS app on the iPhone, updated today with a bunch of new features and improvements, including themes to change the look of the app, support for landscape mode on the iPhone, better subscription sorting, and more.

The big new feature here is the themes. You can now change the background color, text size, title size, and force images to render in greyscale. Other improvements include landscape support for images and videos on the iPhone, the ability to switch between grouping articles by date or feed, and an easier way to enable/disable sharing services. It's a pretty bulky update all in all. You can read the full list of changes here.